#include <iostream>
using namespace std;
#include <string>
class Human{
    public:
        string name;
        int age;
        void introduceSelf(){
            cout<<"I am "<<name<<endl;
            cout<<age<<" years old"<<endl;
        }
};

int main(){
    Human firstMan;
    firstMan.name="jack";
    firstMan.age=24;
    Human firstWoman;
    firstWoman.name="lili";
    firstWoman.age=25;
    firstMan.introduceSelf();
    firstWoman.introduceSelf();
    return 0;
}
